Measurement Computing

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USB-1602HS and USB-1604HS Series

Trigger Sources

Available trigger sources: Analog input hardware, analog software trigger, external

digital input, digital pattern, counter/totalizer

Analog input (hardware) trigger source

USB-1602HS, USB-1602HS-2AO: CH0 to CH1

USB-1604HS, USB-1604HS-2AO: CH0 to CH3

Input signal range: Entire span of selected voltage range; channel selectable.

Trigger level: Software-selectable,12-bit resolution

Hysteresis: Software-selectable,12-bit resolution

Latency: 1.25 uS typ

Accuracy: ±2% of reading, ±10 mV offset max

Analog software trigger source

USB-1602HS, USB-1602HS-2AO: CH0 – CH1

USB-1604HS, USB-1604HS-2AO: CH0 – CH3

Trigger range: Anywhere within range of the trigger channel

Trigger level: Software-selectable, 16-bit resolution

Latency: One sample period max

External digital input trigger source: EXT TRIG (BNC connector), or DIG TRIG

(SCSI connector)

Input signal range: –15 V to +15 V max

Trigger level: TTL level sensitive

Minimum pulse width: 50 ns high, 50 ns low

Latency: 100 ns max

Digital pattern triggering source: DIN0 to DIN15; 16-bit pattern triggering on

the digital port. Software-selectable for trigger on equal, not equal, above, or

below a value. Individual bits can be masked for “don’t care” condition. Latency

is one sample period, max.

Counter/totalizer triggering source: CTR0 to CTR3; Counter/totalizer inputs can

trigger an acquisition. User can trigger on a frequency, or total counts that are

equal/not equal, above/below a value, or within/outside of a window rising/

falling edge. Latency is one sample period, max.

Pacing Sources

Pacer clocks (two): Input pacer clock, output pacer clock

Input pacer: For pacing A/D, DIN and counter signals. Can be internally generated

or externally supplied (

XAPCR).

Output pacer: For pacing DAC, DOUT and timer/PWM signals. Can be internally

generated or externally supplied (

XDPCR).

Input pacer clock sources (two): Internal, external

Internal clock (software-selectable):

Analog channels:

USB-1602HS, USB-1602HS-2AO: 500 ns to 1000 s in 20.83 ns steps

USB-1604HS, USB-1604HS-2AO: 750 ns to 1000 s in 20.83 ns steps

DIN and counter channels: 125 ns to 100 s in 20.83 ns steps.

Can be configured to pace AO and/or DOUT channels.

External clock, TTL level input (XAPCR):

Analog channels:

USB-1602HS, USB-1602HS-2AO: Down to 500 ns min

USB-1604HS, USB-1604HS-2AO: Down to 750 ns min

DIN and counter channels: Down to 125 ns min

Can be configured to pace DAC and/or DOUT channels.

Input pacer rate: Internal or external, XAPCR source

Analog rate:

USB-1602HS, USB-1602HS-2AO: 2 MHz max

USB-1604HS, USB-1604HS-2AO: 1.33 MHz max

Digital rate: 8 MHz if no analog channels are enabled. When analog channels

are enabled:

USB-1602HS, USB-1602HS-2AO: 2 MHz max

USB-1604HS, USB-1604HS-2AO: 1.33 MHz max

Pacer input high voltage: 2.0 V min, 5.5 V max

Pacer input low voltage: 0.8 V max, 0 V min

Minimum pulse width: 50 ns high, 50 ns low

Output pacer clock sources (four): Internal output pacer clock, (independent of

input pacer clock), external output pacer clock (XDPCR), internal input pacing

clock, and external input pacing clock (XAPCR)

Output pacer rate: Internal or external, XDPCR source.

Analog rate: 1.0 MHz max

Digital rate

Analog outputs not enabled: 8 MHz, if no analog outputs are enabled,

Analog outputs enabled: 1 MHz

Internal pacer routed to BNC or SCSI connector



Output high voltage (IOH = –2.5 mA):

Output low voltage (IOL = 2.5 mA):

XAPCR or XDPCR: 2.4 V min, 0.4 V max

Counter Input

Number of channels: 4 independent counters (CTR0, CTR1, CTR2, CTR03); may

be configured as gated.

Modes: Counter, Period, Pulse width, Timing

Counter mode options: Totalize, Clear on Read, Rollover, Stop at top, 16-bit or

32-bit, any other channel can decrement the counter

Period mode options: Measure x1, x10, x100, or x1000 periods, 16-bit or 32-bit,

4 timebases (20.83 ns, 208.3 ns, 2.083 µs, 20.83 µs), any other channel can

gate the period measurement

Pulse width mode options: 16-bit or 32-bit values, 4 time bases to choose from

(20.83 ns, 208.3 ns, 2.083 µs, 20.83 µs), any other channel can gate the pulse

width measurement

Timing mode options: 16-bit or 32-bit values, 4 time bases (20.83 ns, 208.3 ns,

2.083 µs, 20.83 µs)

Resolution: 16- or 32-bits

Maximum input frequency: 20 MHz

Input type: TTL, rising edge triggered

Absolute maximum input voltage: 15 V

Debounce function 16 selections, from 500 ns to 25.5 ms, positive or negative

edge, glitch detect and/or debounce modes

Required input current: ±5 µA

Minimum pulse width: 25 nS high, 25 ns low

Input high voltage: 2.0 V min, 5.5 V max

Input low voltage: 0.8 V max, 0 V min

Timer Output

Number of channels: TMR/PWM0, TMR/PWM1

Effective frequency range: 0.0112 Hz to 24 MHz

Period resolution: 20.83 nS

Pulse width resolution: 20.83 nS

Output high voltage (IOH = –2.5 mA): 2.4 V min

Output low voltage (IOL = 2.5 mA): 0.4 V max

Output current: 2.5 mA max per pin

Quadrature Encoders

Number of encoders: 3 (CTR4A, B, Z; CTR5 A, B, Z; CTR6 A, B, Z)

Signals per decoder: A, B and Z

Resolution: 16- or 32-bits

Maximum frequency: 6 MHz

Minimum pulse width: 25 nS high, 25 ns low

Debounce function: 16 selections, from 500 ns to 25.5 ms, positive or negative

edge, glitch detect, and/or debounce modes

Input high voltage: 2.0 V min, 5.5 V max

Input low voltage: 0.8 V max, 0 V min

Absolute maximum input voltage: 15 V

Power

Supply current (continuous mode): 1.5 A max

+5V EXT output voltage range: 4.75 V to 5.25 V

Isolation (measurement system to PC): 500 VDC min

AC power adapter: MCC part number PS-5V2AEPS

Output voltage: 5 V, ±5%

Output power: 10 watts

Power jack configuration: Two conductor, barrel

Power jack barrel diameter: 6.3 mm

Power jack pin diameter: 2.0 mm

Power jack polarity: Center positive

Environmental

Operating temperature range: 0 °C to 55 °C max

Storage temperature range: –40 °C to 85 °C max

Humidity: 0% to 90% non-condensing max

Mechanical

Dimensions (L × W × H): 142.2 × 180.3 × 38.1 (5.6 × 7.1 × 1.5 in.)

Weight: 675 g (1.5 lbs)

Specifications